| 基于空间相关信息的H.264快速帧内模式选择算法 |
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| 引用本文： | 陈东,何小海,吕瑞,滕奇志. 基于空间相关信息的H.264快速帧内模式选择算法[J]. 四川大学学报(自然科学版), 2007, 44(3): 558-562 |
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| 作者姓名： | 陈东 何小海 吕瑞 滕奇志 |
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| 作者单位： | 四川大学电子信息学院,成都,610064;四川大学电子信息学院,成都,610064;四川大学电子信息学院,成都,610064;四川大学电子信息学院,成都,610064 |
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| 摘 要： | 简要分析了H.264中的帧内预测模式选择，提出一种简单的快速帧内预测模式选择算法.利用视频数据当中的空间相关性，采用相邻编码块的最佳模式来作为当前编码块最佳模式的选择依据，并且加入刷新机制，有效地减小了待选模式的范围，降低了算法的复杂度.试验结果表明：该算法有效地降低了帧内预测的编码时间，降幅达到了50%以上，同时基本保持了原始算法的编码性能.
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| 关 键 词： | 视频编码 H.264 帧内预测 空间相关性 模式选择 刷新 |
| 文章编号： | 0490-6756（2007）03-0558-05 |
| 修稿时间： | 2006-10-15 |
A fast H.264 intra mode decision algorithm based on the spatial correlation |
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| CHEN Dong,HE Xiao-hai,LV Rui and TENG Qi-zhi. A fast H.264 intra mode decision algorithm based on the spatial correlation[J]. Journal of Sichuan University (Natural Science Edition), 2007, 44(3): 558-562 |
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| Authors: | CHEN Dong HE Xiao-hai LV Rui TENG Qi-zhi |
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| Affiliation: | School of Electronics and Information Engineering,Sichuan University,School of Electronics and Information Engineering,Sichuan University,School of Electronics and Information Engineering,Sichuan University,School of Electronics and Information Engineering,Sichuan University |
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| Abstract: | After a simple analysis of the intra prediction mode decision algorithm in H.264, a new fast intra mode decision algorithm is presented in this paper based on the spatial correlation in video data. The spatial adjacent coding block's best mode is utilized to obtain the intra prediction of current coding block and the refresh technique is applied to reduce the error. The number of prediction modes and the algorithm complexity are reduced effectively. The experiment results show that the coding time of the new algorithm can be reduced by above 50% with little degradation in the coding gain. |
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| Keywords: | H.264 |
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